[asterisk-biz] Sprint via L3 problems: no DTMF

Sat Jul 21 12:52:19 CDT 2007

This patch seemed to do the trick for me when we had issues sending DTMF to 
our carrier (which is NOT L3).
http://h6315.com/dtmf.patch

> Date: Fri, 20 Jul 2007 13:13:22 -0700
> From: "Douglas Garstang" <DGarstang at interainc.com>
> Subject: Re: [asterisk-biz] Sprint via L3 problems: no DTMF
> To: "Commercial and Business-Oriented Asterisk Discussion"
> <asterisk-biz at lists.digium.com>
> Message-ID:
> <2312A139236263479664309C0883974604B699CD at imail.interainc.com>
> Content-Type: text/plain; charset="us-ascii"
>
> We received this from Level 3 last week. If they've done it already,
> then they are early!
>
> " Dear Level 3 Customer,
> Level 3 will be upgrading gateway media servers and initial feasibility
> tests have shown that Asterisk software versions prior to 1.4 are not
> compatible with RFC specifications. The issue relates specifically to
> Asterisk's support for Dual-Tone Multi-Frequency (DTMF) named events
> (RFC 2833).
>
> Asterisk software prior to version 1.4 does not send "duration" in the
> actual DTMF Event packet. This violation of RFC 2833, as described in
> sections 3.5 (Payload Format) and 3.6 (Sending Event Packets), causes
> call failures on Level 3's network.
>
> However, this is a known issue which has been resolved by Asterisk
> beginning
> with their code release 1.4.
>
> For customers using earlier version of Asterisk, you will need to
> upgrade your Asterisk software to version 1.4 or higher by August 1,
> 2007 in order to prevent disruptions to your service. Failure to upgrade
> your network will result in DTMF detection failures beginning August 1,
> 2007, may negatively impact your calling traffic over the Level 3
> network.
>
> In-band DTMF detection will continue to function properly on Level 3's
> network and can be used as an alternative to the software upgrade.
>
> Level 3 provides this notification more than 45 days in advance of the
> network GCR so that customers have adequate time to upgrade their
> software.
>
> If you have questions or concerns about this letter please contact the
> Level 3 Service Management Center at 1-877-453-8353 option 4 followed by
> option 3.
> We appreciate your business and apologize for any inconvenience this may
>
> cause you."
>
> Douglas.
>
>
>> -----Original Message-----
>> From: asterisk-biz-bounces at lists.digium.com [mailto:asterisk-biz-
>> bounces at lists.digium.com] On Behalf Of Peter Beckman
>> Sent: Friday, July 20, 2007 12:30 PM
>> To: asterisk-biz at lists.digium.com
>> Subject: [asterisk-biz] Sprint via L3 problems: no DTMF
>>
>> Folks --
>>
>> I'm troubleshooting a strange issue.
>>
>> Asterisk 1.2.13 -> Vitelity -> L3 -> Sprint Mobile Phone 703-867
>>
>> DTMF fails from the Sprint Mobile Phone back to my Asterisk box.
>>
>> When Vitelity routes that call out a different carrier, DTMF works
> fine.
>>
>> Can those of you with access to L3 termination and a Sprint Mobile
> test
>> DTMF back to asterisk?
>>
>> Beckman
>>
> ------------------------------------------------------------------------
> --
>> -
>> Peter Beckman
> Internet
>> Guy
>> beckman at angryox.com
>> http://www.angryox.com/
>>
> ------------------------------------------------------------------------
> --
>> -
>> ** PLEASE NOTE PurpleCow.com IS NOW AngryOx.com DO NOT USE
> PurpleCow.com
>> **
>> ** PurpleCow.com is now owned by City Auto Credit LLC as of May 23,
> 2007
>> **
>>
> ------------------------------------------------------------------------
> --
>> -
>>
>> _______________________________________________
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>
>
> ------------------------------
>
> Message: 7
> Date: Fri, 20 Jul 2007 16:27:06 -0400
> From: "Anthony Cennami" <acennami at gmail.com>
> Subject: Re: [asterisk-biz] Sprint via L3 problems: no DTMF
> To: "Commercial and Business-Oriented Asterisk Discussion"
> <asterisk-biz at lists.digium.com>
> Message-ID:
> <c6653acb0707201327i52161bc9r62e69c5bedca808b at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> My organization uses L3 among others directly for SIP orig/term.  It is
> worth noting that some time ago we received communication from L3 that 
> their
> new infrastructure (switch software update) would no longer support 
> Asterisk
> 1.2 DTMF, and that users term/orig calls on the L3 network would be 
> required
> to upgrade to 1.4.x by 8/1/07
>
> I'm not sure L3 is aware of the implications of this, nor their 
> sub-carriers
> who provide wholesale/resold access into the L3 network, but it is
> unfortunately true.
>
> 1.4 came with a substantial rewrite of the DTMF code, and in fact requires
> SIP options to be enabled if you are going to be passing calls between 
> 1.4and
> 1.2 boxes.
>
> Personally I think L3 is going to be unhappy when they find out just how
> many * 1.2 boxes are terminating RTP directly to them, and that many of
> those people will be forced to reroute traffic/switch carriers/upgrade
> systems.
>
> For those of you who are not connected directly with L3, but do terminate
> RTP with them, I suggest you speak to your reseller to determine what you 
> or
> they may need to do......
>
> anthony
>
>
> On 7/20/07, jltaylor at metrotel.net <jltaylor at metrotel.net> wrote:
>>
>> Many times this is a cell phone config problem.
>> Look at the settings on the cell phone for DTMF.
>> If it is on "SHORT" then change it to "LONG" or "continuous".
>>
>> James Taylor
>> MetroTel
>> http://www.metrotel.net
>> 1-972-505-3503
>>
>>
>> Quoting Peter Beckman <beckman at angryox.com>:
>>
>> > Folks --
>> >
>> > I'm troubleshooting a strange issue.
>> >
>> > Asterisk 1.2.13 -> Vitelity -> L3 -> Sprint Mobile Phone 703-867
>> >
>> > DTMF fails from the Sprint Mobile Phone back to my Asterisk box.
>> >
>> > When Vitelity routes that call out a different carrier, DTMF works 
>> > fine.
>> >
>> > Can those of you with access to L3 termination and a Sprint Mobile test
>> > DTMF back to asterisk?
>> >
>> > Beckman
>> >
>> ---------------------------------------------------------------------------
>> > Peter Beckman                                                  Internet
>> Guy
>> > beckman at angryox.com
>> http://www.angryox.com/
>> >
>> ---------------------------------------------------------------------------
>> > ** PLEASE NOTE PurpleCow.com IS NOW AngryOx.com DO NOT USE 
>> > PurpleCow.com**
>> > ** PurpleCow.com is now owned by City Auto Credit LLC as of May 23, 
>> > 2007
>> **
>> >
>> ---------------------------------------------------------------------------
>> >
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>> >
>>
>>
>>
>>
>> _______________________________________________
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>
>
>
> -- 
> Anthony Cennami
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